Office



No. 6l0,4l4. Patented Sept. 6, I898. F. mum].

GAS BURNER.

App1ica.tion filed Nov. 6, 1897.)

(No Model.)

H MW WITNESSES: lA/VE/VTOH 7w ATTORNEY.

NITED STATES FFTCE.

PATENT TO THE BRIDGEPORT BRASS COMPANY, OF SAME PLACE.

GAS-BURNER.

SPECIFICATION forming part of Letters fPatent No. 610,414, datedSeptember 6, 1898. Application filed November 6, 1897. Eerial No.657,643. (Nomodelo T0 aZZ whom it may concern:

Be it known that I, FRANK RHIND, a citizen of the United States,residing at, Bridge port, Connecticut, have invented a new and usefulImprovement in Gas-Burners, of whic the following is a specification.

My invention relates to incandescent or other Bunsen gas-burners, and isintended to provide a perpetual pilot or subsidiary flame adapted tolight the main flame of the burner when the gas is turned on and toimprove and cheapen such burners.

In the accompanying drawing, which represents, partly in elevation andpartly in vertical section, an incandescent gas-bu rner embodying myinvention, 1 designates a burner-base screw-threaded at 11 and formedwith a taper portion 12, perforated at 13 and 14 2, an air admissionchamber provided with a tubular portion 21 and pin 22; 3, a skirtpierced at 31 4, a mixing-chamber consisting of tube 41, body 42,perforate diaphragm 43, and cap 44; 5, a collar provided with recess 51;6, a spring; 7, a set-collar provided with setscrew 71; 8, a diaphragmformed with depression 81, pierced at 82; 9, a pilot-tube threaded at91, provided with lug 92 and spider 93; 94, an upper pilot-tube formedwith lip 95 and tip 96, and a mantle. In the example of my inventionillustrate the burner-base 1 is a drawn-metal tube threaded at 11 toengage with a gas-fixture and swaged to form a taper portion 12. At

- the upper end of the base 1 is secured the ordinary air-admissionchamber 2, the upper portion of which is a tube 21.

The burner-skirt 3, to which the chimneygallery is attached, may be ofany desired form. A pin 22 on the chamber 2 enters an aperture 31 in theskirt 3, the function of which will hereinafter appear. The skirt 3 ispreferably secured to the mixing-chamber 4, which consists of a tube 41,adapted to sit over thetube 21, and, an enlarged body 42. Asshown, ithas at the juncture of the tube and body a perforate plate 43. It isalso provided with the usual foraminous cap 44. A collar 5, internallyrecessed at 51, is adapted to rotate on the taper portion 12 of thebase 1. The collar 5 is held in position on the base 1 by a spring 6,the upper end of which its free end 96 passes.

which abuts against a set-collar 7, held by a set-screw 71. A diaphragm8 is swaged or forced into the base 1, so as to prevent the flow of gasexcept through an aperture 82, pierced in its dished or depressedportion 81. A pilot-tube 9 is threaded at its foot 91 to engage with acorresponding screw-thread in the depression 81. The tube 9 extendsaxially through the base 1, chamber 2, and tubular portion 21. A lug 92near the upper end of the tube'serves as means by which it may berotated. A spider 93 holds the tube 91 in its axial position. The upperportion 94 of the tube 91 is flared at its lower end to form a lip 95.It is secured axially in the removable mixing-chamber 4 by means of theperforate plate 43 and the cap 44, through supported in any desiredmanner above the cap 44.

The operation of my device will be readily understood from anexamination of the drawing. The burner-base 1 is adapted at 11 to fitthe ordinary gas-fixture. The diaphragm 8 is forced into the base 1midway of its taper portion 12, so as to be gas-tight. The pilottube 9may, by means of the lug 92, be ad- 'justed vertically in the depressedthreaded portion 81, so as to increase or diminish the flow of gasthrough the aperture 82 and through the pilot-tube. The lower portionofthe pilot-tube extends upward only to the top of the tube 21, by whichit is inclosed. It

is therefore not liable to be bent or broken when the skirt 3 andmixing-chamber 4 are removedor replaced. The upper portion 94 of thepilot-tube is provided with a lip 95, which facilitates the replacementof the removable part of the burner. To prevent accidental rotation ofthe pilot-tube 9 by the frictional engagement therewith of the upperportion 94 during the removal or replacement of the skirt 3 and relatedparts, means, as a pin'22 and corresponding aperture 31, are provided toprevent other than vertical motion of the removable upper part of theburner when the parts of the pilot-tube are engaged. It will be seenthat a continuous supply of gas passes through the pilot-tube and burnsabove the foraminous cap 44 within the mantle 10. It may be regulated tosuit various pressures and so as to produce a very small flame, which isprotected from blowing out by the mantle and which is found in practicenot to injure the Bunsen or main flame. The supply of gas for thisBunsen flame is regulated or cut off by the collar 5. Apertures 13 and14 are pierced through the wall of the base 1, respectively above andbelow the diaphragm 8. A vertical recess 51 in the collar 5 serves toconnect these apertures and form a gas-passage to the air-admissionchamber 2, whence the gas and air pass to the mixingchamber 4. It isobvious that one or more pairs of apertures 13 14 and correspondingrecesses 51 may be employed.

The advantages of my device are the cheapness and accuracy with which itmay be constructed, the ease and certainty with which the volume of gassupplied to the pilot-flame maybe regulated and accidental interferencewith such regulation prevented, and the fact that the parts of thedivided pilot-tube are arranged so as not to interfere with the removalor replacement of the upper part of the burner and are fully protectedfrom injury by being entirely within their respective inclosing tubeswhen the parts of the burner are separated.

I am aware of a former foreign patent in which is shown a burner-basemade of solid metal drilled for gas-passages and having a rotatablecollar, also of cast metal. This construction is impracticable onaccount of the difficulty of securing requisite accuracy in drilling thenumerous holes. In my construction the base is easily and cheaply madeof drawn-tubing, the diaphragm being also of sheet metal forced intoplace, the lateral holes being pierced at little expense. By reason ofthe thinness of the walls of the tubular base the friction of the gas ismuch less than through a drilled passage.

I am also aware of a construction in which a pilot-tube axially placedin a burner extends considerably above the tubular extension of thestationary part of the burner. This is very disadvantageous.Incandescent burners are largely used in chandeliers. When the upperpart of the burner has been removed, as for cleaning, it is almostimpossible for the operator reaching up to replace it without bendingthe fragile pilot-tube and thereby rendering the burner useless. In mydevice this cannot occur, as both parts of the pilot-tube are protectedand so guided that maladjustment is impossible.

I am aware that many mechanical alterations may be made in my devicewithout departing from my invention.

What I claim is- 1. In a Bunsen gas-burner in combination a tubularconical burner-base, a non-integral diaphragm secured Within said base,apertures pierced through the wall of said base above and below saiddiaphragm, a recessed collar rotatable on said base and adapted toconnect or close said apertures, a mixing chamber above said base and apilot-tube connected to said diaphragm and adaptedto convey a continuoussupply of gas to the point of ignition of mingled gas and air at I vey acontinuous supply of gas to the point of ignition of mingled gas and airat the free end of said mixing-chamber, and means substantially asdescribed for retaining said collar rotatably on said base.

3. In a Bunsen gas-burner in combination a tubular burner-base, adiaphragm having a laterally-pierced depression secured in said base,apertures pierced in the wall of said base above and below saiddiaphragm, a recessed collar rotatable on said base and adapted toconnect or close said apertures, a mixingchamber above said base, apilot-tube adapted to convey a continuous supply of gas to the point ofignition of mingled gas and air at the free end of said mixing-chamberadjustably secured in the recess in said diaphragm and means foradjusting said tube so as to partially cover the aperture in saidrecess, substantially as described.

4. In a Bunsen gas-burner in combination a burner-base, a chamber abovesaid base hav ing a vertical tubular portion, a removable mixing-chamberdetachably engaging said tubular portion and a transversely-dividedpilot-tube the lower part of which is secured within said base and saidtubular burner portion and the upper part of which is secured withinsaid removable mixing-chamber, the upper end of the lower part of saidpilot-tube being below or substantially at the upper end of said tubularportion whereby said pilottube is protected from injury during theremoval or replacement of said removable chamber, substantially asdescribed.

5. In a Bunsen gas-burner in combination a tubular burner-base, adiaphragm secured within said base, apertures pierced through the wallof said base above and below said diaphragm, a recessed collar rotatableon said base and adapted to connect or close saidapert-ures, a chamberabove and secured to said base having a vertical tubular portion, aremovable mixing-chamber detachably engaging said tubular portion and atransverselydivided pilot-tube the lower part of which is secured Withinsaid base and said tubular burner portion and the upper part of which issecured within said removable mixingchamber, the upper end of the lowerpart of said pilot-tube being below or substantially at the upper end ofsaid tubular portion whereby vided pilot-tube the lower part of which isrotatably secured Within said base and said tubular burner portion andthe upper part of which is secured Within said removable mixing-chamber,and means substantially as described for preventing the rotation of saidremovable chamber on said tubular portion while the parts of saiddivided pilot-tube are being engaged.

FRANK RHIND. Witnesses:

GEO. L. COOPER, CHARLES R. AYRES.

